Password policy

[jeevan kc]

Hello I want to enable password policy on Openldap 2.4.30(to all users. I see 
that the ppolicy.ldif and ppolicy.schema are listed under 
/usr/local/etc/openldap/schema but are not present on 
/usr/local/etc/openldap/slapd.d/cn=config folder. So do I need to add the 
policy.ldif to the cn=config folder ? Is there like specific procedure to do 
that or can I add manually with ldapadd ? Also how do I enable that schema to 
all users ? Please help.
Jeevan